We also take into account the constraint from the mass difference \(\Delta M_s\)  for the mass eigenstates in the \(B_s\) -\(\overline{B}_s\)  system.
The experimental value is taken from the result of HFAG [1]},
\(\left( \Delta M_s \right)_{\rm exp}=17.757\pm 0.021\ {\rm ps}^{-1}.\) 
